Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Heterogeneous arrangement
Reexamination Certificate
2002-11-19
2003-09-23
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Heterogeneous arrangement
C510S238000, C510S422000, C510S463000, C510S491000, C510S499000, C510S501000, C510S505000
Reexamination Certificate
active
06624135
ABSTRACT:
CROSS REFERENCES TO RELATED APPLICATIONS
This application claims priority to Japanese application number 2001-358936, filed Nov. 26, 2001.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
Not applicable.
BACKGROUND OF INVENTION
This invention pertains to a type of cleaning sheet. More specifically, this invention pertains to a type of cleaning sheet with high cleaning ability and excellent finished quality of the surface after cleaning.
Usually, for stains on a solid surface, as the time between contamination and cleaning becomes longer, attachment of the stain to the surface of the base material becomes stronger, so cleaning it becomes difficult. For example, for an oily stain attached to ventilating fans, kitchen walls, glass, refrigerators, etc., when it is left untouched for a long time, it oxidizes to a sticky modified oil. Oily stains that are difficult to clean, e.g., hand stains, gum stains, etc., may be present in other places in the home in addition to the kitchen.
Conventional detergents for removing said oily stains include detergents mainly made of inorganic strong alkaline agents, detergents mainly made of organic amines and water-soluble organic solvents, etc.
However, when said detergents are used as feed liquid, the finished quality (wiping trace, unevenness of wiping, tack, etc.) is problematic. For example, for an inorganic alkaline agent, because it is nonvolatile, wiping traces are left on the cleaned surface. As a result, the appearance is poor. When organic amines are used in place of inorganic alkaline agents, the surfactant added as an auxiliary agent is left as wiping traces on the cleaned surface. As a result, after application of the feed liquid, it is typically necessary to rinse it with a sufficient amount of water.
In particular, there is the following demand: when a detergent itself impregnated in a sheet base material is used, there is no need to perform further wiping or water rinsing after cleaning, and good finished quality is displayed.
In addition when a sheet impregnated with a highly alkaline detergent is used, the hands of the user may become roughened. When a sheet impregnated with a neutral detergent is used, it is necessary to increase the cleaning effect due to the sheet base material itself, so as to improve the effect of removing the stain.
On the other hand, terpene-type hydrocarbons have excellent detergency for oily stains. However, when the content of the terpene-type hydrocarbon contained in the detergent is small, no effect can be expected on detergency. When the content is too large, the odor becomes significant.
The objective of this invention is to solve the aforementioned problems of the conventional methods by providing a type of cleaning sheet that has high cleaning ability and excellent finished quality of the surface after cleaning.
SUMMARY OF THE INVENTION
It was found that when a prescribed type of amine-based compound and a prescribed type of fatty acid are added together with a surfactant to an aqueous detergent composition, and the aqueous detergent composition is impregnated in a sheet base material, a high cleaning ability can be displayed even in the weak alkaline region, and the surface after cleaning has excellent finished quality from the cleaning sheet. As a result, this invention was reached.
The invention relates to a type of cleaning sheet characterized by the fact that a sheet base material is impregnated with an aqueous detergent composition that has a pH of 8-11, and comprising (A) at least one, two or more compounds selected from monoethanolamine, morpholine and morpholine derivatives, (B) a saturated or unsaturated fatty acid having 14-22 carbon atoms, (C) a terpene-type hydrocarbon, and (D) a surfactant. The cleaning sheet may be characterized as follows: said component (A) may be 0.01-5 wt %, said component (B) may be 0.01-20 wt %, said component (C) may be 0.01-2 wt %, and said component (D) may be 0.1-10 wt %. Component (B) is preferably oleic acid. Component (C) is preferably limonene.
Although the mechanism of action of the aqueous cleaning composition impregnated in the cleaning sheet of this invention has not been fully clarified, it is believed that when a prescribed type of amine-based compound and a prescribed type of fatty acid are added, the formed amine soap can facilitate dissolution of the terpene-type hydrocarbon, and, because a surfactant is also added, even in the weak alkaline region, high cleaning ability still can be displayed, and excellent finished quality can be displayed for the surface after cleaning. Also, because weakly alkaline while a high cleaning ability is maintained as mentioned above, it has low irritancy to the skin of the hands of the user.
DETAILED DESCRIPTION
The cleaning sheet of this invention may be characterized as follows: a sheet base material is impregnated with an aqueous detergent composition that has a pH value of 8-11, and comprising (A) at least one, two or more compounds selected from monoethanolamine, morpholine and morpholine derivative compounds, (B) a saturated or unsaturated fatty acid having 14-22 carbon atoms, (C) a terpene-type hydrocarbon, and (D) a surfactant.
There is no special restriction on the type of the sheet base material for use in preparing the cleaning sheet of this invention. Examples that may be used preferably include nonwoven fabric, woven fabric, knitware, felt, paper, etc. In consideration of the productivity, manufacturing cost, ease of use, etc., it is preferred that a nonwoven fabric be used.
For the nonwoven fabric, in order to hold the aqueous cleaning composition in the sheet, it is preferred that it contain hydrophilic fibers. Also, in order to maintain the strength of the nonwoven fabric, it is preferred that it contain hydrophobic fibers.
Examples of hydrophilic fibers that may be used preferably include cotton, silk, and other natural fibers, rayon and other regenerated fibers, acetate and other semisynthetic fibers, polyvinyl alcohol fibers, acrylic fibers, other synthetic fibers, etc.
Examples of hydrophobic fibers that may be used preferably include nylon fibers, polyester fibers, polyolefin fibers (polyethylene, polypropylene, etc.) and other synthetic fibers.
The aforementioned types of fibers may be used either alone or as a mixture of several types.
The nonwoven fabric may be made of hydrophilic fibers alone, or hydrophobic fibers alone, or as a mixture of both types of fibers.
Concerning the state of the hydrophilic fibers and hydrophobic fibers contained in the nonwoven fabric, the hydrophilic fiber and hydrophobic fibers may be mixed to form a single-layer structure nonwoven fabric. Also, the nonwoven fabric may have a laminated structure composed of a layer made of hydrophilic fibers alone and a layer made of hydrophobic fibers alone.
When both hydrophilic fibers and hydrophobic fibers are used together (as either a single-layer structure or laminated structure), the ratio of the two types of fibers by weight is preferably in the range of 5:95~95:5, or more preferably in the range of 10:90~90:10.
Forms of fibers for forming the nonwoven fabric in this invention include the conventionally used single fibers, long fibers, as well as fibers with profiled cross sections, such as circular shape, elliptical shape, etc., composite fibers, very fine fibers, divided fibers, and other types of fibers. Among these forms, the very fine fibers and divided fibers are preferred in consideration of their stain- and dust-removing ability. Examples of very fine fibers include those made of polyester, nylon, polyethylene, polypropylene, acrylic resin, etc., with sizes in the range of 0.5-3 &mgr;m. Examples of divided fibers include polyester
ylon, polyester/polypropylene, polyethylene/polypropylene, etc.
The structure of the nonwoven fabric may be a monolayer or laminated structure having two or more layers. For the laminated structure, it is preferred that 2-3 layers be laminated. In this invention, the monolayer structure is especially preferred.
Preferable combinations of the materials of fibers in this inventio
Ogden Necholus
S.C. Johnson & Son Inc.
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